[TR] Torque Wrench Dilemma

[William Babbitt]

Hi Bob,
Yes, 160 lbs of you on the end of an 18" breaker bar will result in about 240
ft-lbs of torque.
However, setting your torque wrench at 125 ft-lbs and extending the handle to
24" will only make it easier for you to get to 125 ft-lbs.  The torque wrench
doesn't care what you do with the handle length.
So......
Go ahead and step on that breaker bar.
I had to do the same thing for the rear axle nut on my TVR 280i.  It worked
just fine.
thanks,
Bill Babbitt
Gales Ferry, CT
TR3a, TVR 280i


--- On Sat, 1/3/09, Bob Danielson <75TR6 at tr6.danielsonfamily.org> wrote:

From: Bob Danielson <75TR6 at tr6.danielsonfamily.org>
Subject: [TR] Torque Wrench Dilemma
To: triumphs at autox.team.net, 6pack at autox.team.net
Date: Saturday, January 3, 2009, 8:37 AM

Oh math/physics/engineer gurus..........Here's my question....

Goodparts CVJs specify that the 1-1/4" axle nut be torqued to 220-250 lbs.
My audible click-type torque wrench maxes out at 150 lbs.

It's been suggested that 160 lb me standing on the end of an 18"
breaker bar
would exert about that torque. I like this idea.

Richard Good told me that setting the wrench at 125 lbs and putting a 24"
pipe over it would yield about the right force.

Then I found these two formulas http://tinyurl.com/97faw7 &
http://tinyurl.com/774vwv which appear to work math-wise but where does the
extension go? Between the nut and the drive end of the wrench or can you
just slide a pipe over the wrench handle to extend it?

I've also heard that most shops would just hit it with their impact wrench
and call it a day.

These are CVJs and the 1-1/4" nut is an all steel grade 8 locking nut.

So....what's the best way to accomplish this....and buying a $200 torque
wrench is not the answer though I may just rent one if necessary.

Thanks

Bob

Bob Danielson
1975 TR6 CF38503U
Running w/ Throttle Body Injection
Toyota 5 Speed & Nissan LSD
http://tr6.danielsonfamily.org
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